Seems like the fit bit does quite a bit more then. I noticed the spark one doesn't track the Leslie Sansone indoor walking very well, other than noting the length of a workout. It doesn't really count the stepping accurately so the miles are off. It does do a nice job when I am walking on the treadmill and correlates well with that. It does the calories. I do like the way it automatically syncs with the spark tracker. It doesn't track my sleep, but I already know I don't sleep long or well. Thanks for the information.
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